Use Calculator, Voice Memos, Stopwatch, Timer, and Newsstand
Your iPhone includes a powerful but straightforward Calculator app, a Voice Memos app for recording voice notes or audio, and a Clock app that has stopwatch and timer capabilities. The Newsstand app acts as a gateway to news and magazine apps.
Use the Calculator App
Press the Home button to display the Home screen, and then tap Utilities to open the Utilities folder. Tap Calculator to open the Calculator app. You can then perform straightforward calculations in portrait orientation. For a fuller range of functions, turn your iPhone to landscape orientation.
Use the Voice Memos App ...